Movable point frog

ABSTRACT

The present invention provides a movable point frog. In this application, quasi-continuity of rails is achieved at the frog, so that a gap in the frog is eliminated, vibration and noise are reduced, and transverse impact of wheels is eliminated. Guard rails do not need to be disposed. The frog itself does not limit the speed of a train running on a main line and a branch line. Therefore, the train running on the main line can pass through the frog without reducing the speed. A relatively small curve radius and a relatively large frog angle may be adopted for the branch line. Compared with integrally cast frog equipment in the prior art, all the components in this application are detachably connected, and therefore can be simply mounted, easily maintained, and produced in batch.

BACKGROUND OF THE INVENTION

The present invention relates to the technical field of railway equipment, and in particular, to a movable point frog.

A turnout is a transitional apparatus for guiding a locomotive and a vehicle to switch from one line to another. There is a problem that one rail crosses another rail at a turnout. Since the reliable operation of a locomotive and a vehicle on working surfaces of the rails is realized by convex edges (flanges) on inner sides of wheels (wheel pairs), there is a problem that the flanges of the wheel running on one rail cut the other rail at a crossing of the two rails, and vice versa. In other words, both the rails at this crossing have an interruption, which adversely affects the travel of the locomotive and vehicle. This problem is resolved by using a frog apparatus.

At present, the commonly used frog apparatus is integrally cast with high casting costs, and is difficult to transport and maintain.

At present, the frog apparatus in the prior art is formed of a frog (point rail) and a wing rail. The minimum distance between two working edges of the wing rail is referred to as a frog throat. A distance from the throat to an actual point of the frog is called a gap in the frog because the flanges are not guided by rails within this distance. The throat cannot be too width because too large a width means a large gap. To prevent the wheels from entering an opposite side or impacting the point, guard rails are disposed on inner sides of two corresponding rails to guide the wheels to enter corresponding flange ways.

In this structure, in order to overcome the problems caused by the gap, such as vibration, noise and transverse impact of wheels, considerable difficulties are brought to the design. In addition to the provision of guard rails, the wing rail is bent and extended at the throat for compensation. This requires a relatively small frog angle. A theoretical point of the point rail is unattainable. Therefore, the actual point is 6 mm to 10 mm wide, and the frog angle is relatively small. This requires the frog apparatus to be longer and heavier, and therefore the frog apparatus is more expensive to manufacture, and the effect is not desirable. So far, the frog is still a weakness for railway engineering, which limits the speed of travel.

BRIEF SUMMARY OF THE INVENTION

To resolve the foregoing problem, the present invention provides a movable point frog which can be mounted by assembling, is convenient to transport, has low manufacturing cost, eliminates the gap in frog, reduces vibration and noise, and eliminates transverse impact of wheels. In addition, no guard rails need to be provided, and the frog itself has no restriction on the speed of trains running on a main line and a branch line.

To achieve the foregoing objective, the technical solution adopted by the present invention is as follows: A movable point frog includes a frog assembly and a wing rail assembly, wherein the wing rail assembly includes a first wing rail and a second wing rail that are symmetrically distributed; the frog assembly includes a frog solid body, a first fixing bottom plate, a traction apparatus, a first exit rail detachably connected to the first fixing bottom plate, a second exit rail detachably connected to the first fixing bottom plate, and a rotating shaft fixedly disposed at the first fixing bottom plate, wherein the first exit rail and the second exit rail are symmetrically distributed, the first exit rail and the first wing rail are located on the same side, and the second exit rail and the second wing rail are located on the same side; and the frog solid body and the first fixing bottom plate form a rotating mechanism through the rotating shaft, the traction apparatus is drivingly connected to the frog solid body and enables the frog solid body to rotate around the rotating shaft, when one side face of the frog solid body abuts against the first wing rail, the other side face of the frog solid body is flush with the second exit rail, and when one side face of the frog solid body abuts against the second wing rail, the other side face of the frog solid body is flush with the first exit rail.

Further, the frog assembly further includes a first fixing bracket and two first rail pressing plates, the first fixing bracket is fixedly disposed on the surface of the first fixing bottom plate via a bolt, and the first exit rail and the second exit rail are respectively detachably connected to two sides of the first fixing bracket via the first rail pressing plates.

Further, the wing rail assembly further includes a second fixing bottom plate, two second rail pressing plates, and a second fixing bracket detachably connected to the surface of the second fixing bottom plate, and the first wing rail and the second wing rail are respectively detachably connected to two sides of the second fixing bracket via the second rail pressing plates.

Further, a drainage hole is provided in the surface of the first fixing bottom plate between the first exit rail and the second exit rail.

Further, the frog solid body is integrally formed by a first frog body located at a front end and a second frog body located at a rear end, the first frog body has a triangular cross section, and the second frog body has a trapezoidal cross section; and a rotating shaft hole that penetrates through the frog solid body vertically is provided at a joint between the first frog body and the second frog body, the frog solid body is assembled with the rotating shaft through the rotating shaft hole, and form the rotating mechanism with the first fixing bottom plate.

Further, the first frog body is disposed between the first wing rail and the second wing rail, the second frog body is disposed in a notch formed by the first exit rail and the second exit rail, and the second frog solid body is kept at a distance from inner side faces of both the first exit rail and the second exit rail, respectively.

Further, the traction apparatus includes a tractor and a pulling plate fixedly connected to the bottom surface of the first frog body, two ends of the pulling plate are respectively provided with a traction mounting hole, and a driving end of the tractor is assembled with the traction mounting hole and enables two side faces of the first frog body to respectively abut against an inner side face of the first wing rail and an inner side face of the second wing rail tightly.

Further, the movable point frog further includes a fixing assembly used to connect the wing rail assembly and the frog assembly, wherein the fixing assembly is located between the wing rail assembly and the frog assembly; and the fixing assembly includes fixing apparatuses symmetrically distributed, each fixing apparatus includes a connecting plate and two limiting plates, two ends of the connecting plate are respectively fixedly disposed on the surfaces of the first fixing bottom plate and the second fixing bottom plate via a bolt, and the two limiting plates are fixed on the first fixing bottom plate and the second fixing bottom plate via bolts and abut against the two ends of the connecting plate tightly.

The beneficial effects of the present invention lie in that:

1. In this application, the quasi-continuity of rails is achieved at the frog, the gap in the frog is eliminated, vibration and noise are reduced, and transverse impact of wheels is eliminated. Guard rails do not need to be disposed. The frog itself does not limit the speed of a train running on a main line and a branch line. Therefore, the train running on the main line can pass through the frog without reducing the speed. A relatively small curve radius and a relatively large frog angle may be adopted for the branch line. In this way, the turnout crossover can be shortened, the occupied area can be reduced, railway instruments can be saved, and the frog apparatus has a reduced length because of the increased frog angle.

2. Compared with integrally cast frog equipment in the prior art, all the components in this application are detachably connected, and therefore can be simply mounted, easily maintained, and produced in batch.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a three-dimensional schematic structural diagram according to the present invention.

FIG. 2 is a top view according to the present invention.

FIG. 3 is a schematic structural diagram showing assembling of a frog solid body with a pulling plate according to the present invention.

FIG. 4 is a schematic structural diagram of a first wing rail and a second wing rail according to the present invention.

FIG. 5 is a schematic structural diagram of a second rail pressing plate according to the present invention.

FIG. 6 is a schematic structural diagram of first fixing bracket and a second fixing bracket according to the present invention.

FIG. 7 is a schematic structural diagram of a first fixing bottom plate and a second fixing bottom plate according to the present invention.

Reference numerals: 1. Frog solid body; 11. First frog body; 12. Second frog body; 13. Rotating shaft hole; 2. Rotating shaft; 31. First exit rail; 32. Second exit rail; 4. First fixing bracket; 5. First rail pressing plate; 6. First fixing bottom plate; 7. Pulling plate; 71. Traction mounting hole; 8. Connecting plate; 9. Limiting plate; 10. Second fixing bottom plate; 11. Second rail pressing plate; 111. Second outer rail pressing plate; 112. Second inner rail pressing plate; 121. First wing rail; 122. Second wing rail; 1211. Front wing rail; 1212. Rear wing rail; 13. Second fixing bracket; and 14. Drainage hole.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIG. 1 to FIG. 7, the present invention relates to a movable point frog, including a wing rail assembly and a frog assembly disposed from a front end to a rear end. The wing rail assembly includes a first wing rail 121 and a second wing rail 122 that are symmetrically distributed on the left and right. The frog assembly includes a frog solid body 1, a first fixing bottom plate 6, a traction apparatus, a first exit rail 31 detachably connected to the first fixing bottom plate 6, a second exit rail 32 detachably connected to the first fixing bottom plate 6, and a rotating shaft 2 fixedly disposed at the first fixing bottom plate 6. The first exit rail 31 and the second exit rail 32 are symmetrically distributed on the left and right, the first exit rail 31 and the first wing rail 121 are located on the same side, and the second exit rail 32 and the second wing rail 122 are located on the same side. The frog solid body 1 and the first fixing bottom plate 6 form a rotating mechanism via the rotating shaft 2. The traction apparatus is drivingly connected to the frog solid body and enables the frog solid body to rotate around the rotating shaft 2. When one side face of the frog solid body abuts against an inner side face of the first wing rail 121, the other side face of the frog solid body is flush with an outer side face of the second exit rail 32. When one side face of the frog solid body abuts against an inner side face of the second wing rail 122, the other side face of the frog solid body is flush with an outer side face of the first exit rail 31.

In this application, the quasi-continuity of rails is achieved at the frog, a gap in the frog is eliminated, vibration and noise are reduced, and transverse impact of wheels is eliminated. Guard rails do not need to be disposed. The frog itself does not limit the speed of a train running on a main line and a branch line. Therefore, the train running on the main line can pass through the frog without reducing the speed. A relatively small curve radius and a relatively large frog angle may be adopted for the branch line. In this way, the turnout crossover can be shortened, the occupied area can be reduced, railway instruments can be saved, and the frog apparatus has a reduced length because of the increased frog angle. Compared with integrally cast frog equipment in the prior art, all the components in this application are detachably connected, and therefore can be simply mounted, easily maintained, and produced in batch.

In addition, in this application, the frog solid body and the first fixing bottom plate 6 form the rotating mechanism via the rotating shaft 2, through which rotating mechanism, switching at a turnout is realized, thereby effectively reducing the switching force of a movable point rail. In addition, the traction apparatus is used to pull the frog solid body. Therefore, only one traction point needs to be designed, thereby reducing the quantity of traction points. Thus, the purpose of reducing the switching force, reducing the quantity of traction points and shortening the total length of the frog is achieved while ensuring the safety.

Referring to FIG. 3, in this specific embodiment, the frog solid body is formed by integrally casting a first frog body located at a front end 11 and a second frog body located at a rear end 12. The first frog body 11 has a triangular cross section, and the second frog body 12 has a trapezoidal cross section. A rotating shaft hole 13 that penetrates through the frog solid body vertically is provided at a joint between the first frog body 11 and the second frog body 12. The frog solid body is assembled with the rotating shaft 2 through the rotating shaft hole 13, and forms the rotating mechanism with the first fixing bottom plate 6. Moreover, the front end (the first frog body 11) of the frog solid body is disposed between the first wing rail 121 and the second wing rail 122. The tail end (the second frog body 12) of the frog solid body is disposed in a notch formed by the first exit rail 31 and the second exit rail 32. The second frog solid body is kept at a distance from inner side faces of the first exit rail 31 and the second exit rail 32, respectively. Moreover, the traction apparatus is drivingly connected to the first frog body 11 and enables the frog solid body to rotate around the rotating shaft 2. By disposing the second frog body 12 in the notch formed by the first exit rail 31 and the second exit rail 32, and keeping the second frog solid body at a distance from the inner side faces of the first exit rail 31 and the second exit rail 32, respectively, the distance is reserved for the rotation of the frog solid body around the rotating shaft 2.

Referring to FIG. 1 to FIG. 7, furthermore, the frog assembly further includes a first fixing bracket 4 and two first rail pressing plates 5. The first fixing bracket 4 is fixedly disposed on the surface of the first fixing bottom plate 6 via a bolt, and the first exit rail 31 and the second exit rail 32 are respectively detachably connected to two sides of the first fixing bracket 4 via the first rail pressing plates 5. In this specific embodiment, a specific mounting manner of the first exit rail 31, the second exit rail 32, the first rail pressing plates 5, and the first fixing bracket 4 is as follows. Corresponding first bolt holes are provided in side faces of all of the first exit rail 31, the second exit rail 32, the first rail pressing plates 5, and the first fixing bracket 4. The first exit rail 31 and the rail pressing plates are sequentially aligned with the first bolt hole provided in one side of the first fixing bracket 4, and are assembled with the first fixing bracket 4 via a bolt. The second exit rail 32 and the rail pressing plates are sequentially aligned with the first bolt hole provided in the other side of the first fixing bracket 4 and are assembled with the first fixing bracket 4 via a bolt. The first fixing bracket 4 and the two first rail pressing plates 5 are all fixed to the first fixing bottom plate 6 via bolts, so that the mounting is convenient and the maintenance is simple. In addition, compared with conventional integral casting, this application can be mounted by assembling, so that manufacturing costs and transportation costs are greatly reduced.

Further, the wing rail assembly further includes a second fixing bottom plate 10 and a second fixing bracket 13 detachably connected to the surface of the second fixing bottom plate 10. The first wing rail 121 and the second wing rail 122 are respectively detachably connected to two sides of the second fixing bracket 13 via second rail pressing plates 11. In this specific embodiment, the first wing rail 121, the second wing rail 122, and the second rail pressing plates 11 are all detachably connected to the second fixing bottom plate 10, so that the movable point frog can be mounted by assembling, thereby greatly reducing the manufacturing costs and transportation costs.

Referring to FIG. 4 and FIG. 5, the specific structure of the first wing rail 121 is described below in detail. In this specific embodiment, the first wing rail 121 and the second wing rail 122 have consistent structures and are placed symmetrically on the left and right. Therefore, the specific structure of the second wing rail 122 is similar to that of the first wing rail 121. The first wing rail 121 is located on the left side, and the second wing rail 122 is located on the right side. The first wing rail 121 is formed by integrally casting a front wing rail 1211 located at a front end and a rear wing rail 1212 located at a rear end. The rear wing rail 1212 is parallel to the Y axis of a spatial coordinate system, and the front wing rail 1211 of the first wing rail 121 is bent leftward. The second rail pressing plates 11 includes a second outer rail pressing plate 111 and a second inner rail pressing plate 112. The second outer rail pressing plate 111 is attached to outer side faces of the first wing rail 121 and the second wing rail 122 and is fixed via bolts. The second inner rail pressing plate 112 is respectively attached to inner side faces of the rear wing rails 1212 of the first wing rail 121 and the second wing rail 122 and is fixed via bolts.

Referring to FIG. 4 and FIG. 5, an included angle is formed between extension lines of the front wing rails 1211 of the first wing rail 121 and the second wing rail 122. The included angle is set according to actual working requirements. To be specific, it is ensured that when one side face of the frog solid body abuts against the inner side face of the rear wing rail 1212 of the first wing rail 121, the other side face of the frog solid body is flush with the outer side face of the second exit rail 32, that is, the inner side face of the front wing rail 1211 of the first wing rail 121, the other side face of the frog solid body, and the outer side face of the second exit rail 32 are all in the same extension line. Similarly, when one side face of the frog solid body abuts against the inner side face of the rear wing rail 1212 of the second wing rail 122, the other side face of the frog solid body is flush with the outer side face of the first exit rail 31, that is, the inner side face of the front wing rail 1211 of the second wing rail 122, the other side face of the frog solid body, and the outer side face of the first exit rail 31 are all in a same extension line.

Further, the traction apparatus includes a tractor and a pulling plate 7 fixedly connected to the bottom surface of the first frog body 11, and the pulling plate 7 extends in a direction perpendicular to the rear wing rail 1212 of the first wing rail 121. Two ends of the pulling plate 7 are provided with a traction mounting hole 71 for assembling with a driving end of the tractor, respectively.

Referring to FIG. 1 and FIG. 2, furthermore, the movable point frog further includes a fixing assembly used to connect the wing rail assembly and the frog assembly and located between the wing rail assembly and the frog assembly. The fixing assembly includes fixing apparatuses that are symmetrical on the left and right. Each fixing apparatus includes a connecting plate 8 and two limiting plates 9. Two ends of one connecting plate 8 are respectively fixedly disposed on the left side of the first fixing bottom plate 6 and the second fixing bottom plate 10, and two ends of the other connecting plate 8 are respectively fixedly disposed on the right side of the first fixing bottom plate 6 and the second fixing bottom plate 10 via a bolt. The two limiting plates 9 are fixed on the first fixing bottom plate 6 and the second fixing bottom plate 10 via bolts and abut against the two ends of the connecting plate 8 tightly. Two connecting plates 8 are used to connect the first fixing bottom plate 6 and the second fixing bottom plate 10. Moreover, in this specific embodiment, according to actual requirements, through the assembly between bolts and bolt holes in the surfaces of the first fixing bottom plate 6 and the second fixing bottom plate 10, the distance between the first fixing bottom plate 6 and the second fixing bottom plate 10 can be adjusted. Moreover, the limiting plates 9 disposed at two ends of each connecting plate 8 are used to secure the connection of the connecting plate 8, and preventing the connecting plate 8 from being deviated.

Referring to FIG. 1 to FIG. 7, further, a drainage hole 14 is provided in the surface of the first fixing bottom plate 6 between the first exit rail 31 and the second exit rail 32. The drainage hole 14 is disposed to facilitate the drainage of the entire equipment and prevent the accumulation of rain water from affecting the service life of the entire equipment.

The foregoing embodiments are merely preferred ones of the present invention, and are not intended to limit the scope of the present invention. Various variations and improvements made by a person of ordinary skill in the art to the technical solutions of the present invention without departing from the design spirit of the present invention shall all fall within the protection scope defined by the claims of the present invention. 

What is claimed is:
 1. A movable point frog, comprising a frog assembly and a wing rail assembly, wherein the wing rail assembly comprises a first wing rail and a second wing rail that are symmetrically distributed; the frog assembly comprises a frog solid body, a first fixing bottom plate, a traction apparatus, a first exit rail detachably connected to the first fixing bottom plate, a second exit rail detachably connected to the first fixing bottom plate, and a rotating shaft fixedly disposed at the first fixing bottom plate, wherein the first exit rail and the second exit rail are symmetrically distributed, the first exit rail and the first wing rail are located on the same side, and the second exit rail and the second wing rail are located on the same side; and the frog solid body and the first fixing bottom plate form a rotating mechanism via the rotating shaft, the traction apparatus is drivingly connected to the frog solid body and enables the frog solid body to rotate around the rotating shaft, when one side face of the frog solid body abuts against the first wing rail, the other side face of the frog solid body is flush with the second exit rail, and when one side face of the frog solid body abuts against the second wing rail, the other side face of the frog solid body is flush with the first exit rail.
 2. The movable point frog according to claim 1, wherein the frog assembly further comprises a first fixing bracket and two first rail pressing plates, the first fixing bracket is fixedly disposed on the surface of the first fixing bottom plate via a bolt, and the first exit rail and the second exit rail are respectively detachably connected to two sides of the first fixing bracket via the first rail pressing plates.
 3. The movable point frog according to claim 1, wherein the wing rail assembly further comprises a second fixing bottom plate, two second rail pressing plates, and a second fixing bracket detachably connected to the surface of the second fixing bottom plate, and the first wing rail and the second wing rail are respectively detachably connected to two sides of the second fixing bracket via the second rail pressing plates.
 4. The movable point frog according to claim 1, wherein a drainage hole is provided in the surface of the first fixing bottom plate, between the first exit rail and the second exit rail.
 5. The movable point frog according to claim 1, wherein the frog solid body is integrally formed by a first frog body located at a front end and a second frog body located at a rear end, the first frog body has a triangular cross section, and the second frog body has a trapezoidal cross section; and a rotating shaft hole that penetrates through the frog solid body vertically is provided at a joint between the first frog body and the second frog body, the frog solid body is assembled with the rotating shaft through the rotating shaft hole, and forms the rotating mechanism with the first fixing bottom plate.
 6. The movable point frog according to claim 5, wherein the first frog body is disposed between the first wing rail and the second wing rail, the second frog body is disposed in a notch formed by the first exit rail and the second exit rail, and the second frog solid body is kept at a distance from inner side faces of both the first exit rail and the second exit rail, respectively.
 7. The movable point frog according to claim 5, wherein the traction apparatus comprises a tractor and a pulling plate fixedly connected to the bottom surface of the first frog body, two ends of the pulling plate are provided with a traction mounting hole, respectively, and a driving end of the tractor is assembled with the traction mounting hole and enables two side faces of the first frog body to respectively abut against an inner side face of the first wing rail and an inner side face of the second wing rail tightly.
 8. The movable point frog according to claim 1, further comprising a fixing assembly used to connect the wing rail assembly and the frog assembly, wherein the fixing assembly is located between the wing rail assembly and the frog assembly; and the fixing assembly comprises symmetrically distributed fixing apparatuses, each fixing apparatus comprises a connecting plate and two limiting plates, two ends of the connecting plate are respectively fixedly disposed on the surfaces of the first fixing bottom plate and the second fixing bottom plate via a bolt, and the two limiting plates are fixed on the first fixing bottom plate and the second fixing bottom plate via bolts and abut against the two ends of the connecting plate tightly. 